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HKS 50003-M45RE Iridium M-Series Super Fire Racing Spark Plug

(2004-2011 Mazda RX-8; 1979-1995 Mazda RX-7)

Part of: HKS M-Series Super Fire Racing Iridium Spark Plug

Other options in this family: HKS 50003-M45iL HKS 50003-M45HL HKS 50003-M45XL HKS 50003-M50HL HKS 50003-M40XL

Manufacturer

Picture for manufacturer HKS

Part Number

50003-M45RE
12 reviews
Sale Price

$460.00

Estimated ship date Friday, November 27

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Product Details

The HKS 50003-M45RE is a high-performance M-Series Super Fire Racing spark plug featuring advanced iridium alloy construction for superior ignition performance, exceptional durability, and resistance to carbon buildup under extreme conditions.

Key Features:

  • 0.6mm iridium alloy center electrode for concentrated spark energy and extended service life
  • Outer electrode with platinum chip for enhanced wear resistance
  • Short-type outer electrode design provides superior anti-vibration properties
  • Thermal edge technology optimizes heat dissipation
  • Spark support gap enhances ignition reliability
  • Iridium alloy with 2454°C melting point withstands extreme combustion temperatures and high compression
  • Nickel-coated housing prevents premature deterioration

The M-Series is specifically engineered for high-load applications requiring reliable ignition, maximum durability, and anti-carbon buildup protection. The ultra-fine 0.6mm iridium alloy center electrode delivers focused spark energy while the platinum-tipped outer electrode ensures consistent performance under demanding conditions. Ideal for turbocharged, supercharged, and highly tuned engines operating at elevated boost levels and compression ratios.

Note: Sold individually. Select quantity needed for your application.

Products specifications

Fits

2004-2011 Mazda RX-8; 1979-1995 Mazda RX-7

Heat Range

9

Best price I could find on Autolite HTO plugs highly recommended

Did not receive email with tracking number. When checking order online, the status indicated the order was in process. I was surprised when the order was delivered only three days after placement. I expected a longer wait time. Good price, fast delivery, 4.5 stars.

Excellent. Shipping was quick and prices were low.

none

Excellent, rapid, free shipping

NA

They have the best prices and fast shipping too.

WOW! What a relief to be able to order a product and receive the correct product in excellent condition in a timely manner! Not to mention the prices beat the competition by more than a little!!

Best price I could find! Great customer service kept me informed through the whole order process to insure acuracy since it was being sent directly from the manufacture. Recieved my order in good time, right parts and no damage. Overall very satisfied and will be doing business again in the future.

Very competitive low prices and great product selection. Will definitely look to this vendor when purchasing automotive parts in the future.

Great prices and FAST shipping!! Definitely will buy products here again!

Although there was a mix up with the shipping on my order customer service was helpful and expedited the solution and made it worth my trouble. I will be keeping Autoplicity in mind for any other parts I might need for my Jeep.

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